STRUCT IOMMU_VIOMMU_TEGRA241_CMDQV(9)

💖 NAME 💖

okay bestie, welcome to the struct iommu...gra241_cmdqv(9) page from the Kernel API Manual ✨ this is the glow-up for:

struct iommu_viommu_tegra241_cmdqv — NVIDIA Tegra241 CMDQV Virtual Interface (IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV) 🎀

---

✨ SYNOPSIS ✨

no cap, here's the struct in all its iconic glory:

struct iommu_viommu_tegra241_cmdqv {
           __aligned_u64 out_vintf_mmap_offset;
           __aligned_u64 out_vintf_mmap_length;
        };

---

🫶 Members 🫶

• out_vintf_mmap_offset — mmap offset argument for VINTF's page0 💅
• out_vintf_mmap_length — mmap length argument for VINTF's page0 🎀

---

🌸 Description 🌸

okay so both out_vintf_mmap_offset and out_vintf_mmap_length are reported by kernel for user space to mmap the VINTF page0 from the host physical address space to the guest physical address space, so that a guest kernel can directly R/W access to the VINTF page0 in order to control its virtual command queues. literally the whole point, iykyk 💖

---

👑 SEE ALSO 👑

buckle up bestie, this list is giving main character energy:

• Kernel file ./include/uapi/linux/iommufd.h
• General ioctl format(9)
• struct iommu_destroy(9)
• struct iommu_ioas_alloc(9)
• struct iommu_iova_range(9)
• struct iommu_ioas_iova_ranges(9)
• struct iommu_ioas_allow_iovas(9)
• enum iommufd_ioas_map_flags(9)
• struct iommu_ioas_map(9)
• struct iommu_ioas_noiommu_get_pa(9)
• struct iommu_ioas_map_file(9)
• struct iommu_ioas_copy(9)
• struct iommu_ioas_unmap(9)
• enum iommufd_option(9)
• enum iommufd_option_ops(9)
• struct iommu_option(9)
• enum iommufd_vfio_ioas_op(9)
• struct iommu_vfio_ioas(9)
• enum iommufd_hwpt_alloc_flags(9)
• enum iommu_hwpt_vtd_s1_flags(9)
• struct iommu_hwpt_vtd_s1(9)
• struct iommu_hwpt_arm_smmuv3(9)
• struct iommu_hwpt_amd_guest(9)
• enum iommu_hwpt_data_type(9)
• struct iommu_hwpt_alloc(9)
• enum iommu_hw_info_vtd_flags(9)
• struct iommu_hw_info_vtd(9)
• enum iommu_hw_info_arm_smmuv3_flags(9)
• struct iommu_hw_info_arm_smmuv3(9)
• struct iommu_hw_info_tegra241_cmdqv(9)
• struct iommu_hw_info_amd(9)
• enum iommu_hw_info_type(9)
• enum iommufd_hw_capabilities(9)
• enum iommufd_hw_info_flags(9)
• struct iommu_hw_info(9)
• struct iommu_hwpt_set_dirty_tracking(9)
• enum iommufd_hwpt_get_dirty_bitmap_flags(9)
• struct iommu_hwpt_get_dirty_bitmap(9)
• enum iommu_hwpt_invalidate_data_type(9)
• enum iommu_hwpt_vtd_s1_invalidate_flags(9)
• struct iommu_hwpt_vtd_s1_invalidate(9)
• struct iommu_viommu_arm_smmuv3_invalidate(9)
• struct iommu_hwpt_invalidate(9)
• enum iommu_hwpt_pgfault_flags(9)
• enum iommu_hwpt_pgfault_perm(9)
• struct iommu_hwpt_pgfault(9)
• enum iommufd_page_response_code(9)
• struct iommu_hwpt_page_response(9)
• struct iommu_fault_alloc(9)
• enum iommu_viommu_type(9)
• struct iommu_viommu_alloc(9)
• struct iommu_vdevice_alloc(9)
• struct iommu_ioas_change_process(9)
• enum iommu_veventq_flag(9)
• struct iommufd_vevent_header(9)
• enum iommu_veventq_type(9)
• struct iommu_vevent_arm_smmuv3(9)
• struct iommu_vevent_tegra241_cmdqv(9)
• struct iommu_veventq_alloc(9)
• enum iommu_hw_queue_type(9)
• struct iommu_hw_queue_alloc(9)

---

that's the whole page bestie 💖 source/version is ./include/uapi/linux, dated October 2026, and the page is struct iommu...gra241_cmdqv(9). mwah 💅✨